If you are running windows, you might give this a try. Plug in your iPod. Open My Computer (or Computer for Vista). Click on Folder options and enable to view hidden files. Your ipod should be showing up as a mass storage device. Next go to iPod_control and click on the folder named Device. If your iPod is locked, there will be a file _locked . Rename the file to _unlocked. Remove your iPod and it will be cleared, again not sure if it works for a disabled one. You could also try a program like iExplorer and see if you can browse your files. Also, make sure that you disable iTunes, so it won't pop up when you plug your iPod in. Hope this helps. Good Luck.
Hope you have this screen. The first option is the one that you need to turn off to prevent the auto sync. You should get there by Edit>Preference